#include <iostream>
#include <cstdlib>
using namespace std;
int main()
{
	cout << "HelloWorld!" << endl
		 << 8 << " Today!" << endl;
	int number;
	cout << "Enter a decimal number: ";
	cin >> number;
	cout << "value in octal=0"
		 << oct << number << endl
		 << "value in hex=0x"
		 << hex << number << endl;
	system("ls");
	return 0;
}